Modular block



FIG. 1. Is a first perspective view of a modular block showing the new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a back elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is a bottom plan view thereof.

The evenly spaced broken lines depict portions of the modular block that form no part of the claimed design. 

CLAIM The ornamental design for modular block, as shown and described. 